Concrete arch.



G. D. KELLY & P. MAHONEY.

CONCRETE ARCH.

APPLIUATION FILED MAR. 29, 1912.

Patented Sep1;.3o,1913.

2 SHEETS-SHEET l.

G. D. KELLY a P. MAHONEY.

CONCRETE ARCH. APPLIOATIONTILBD MAB.. 29, 1912*.

1,074,268, Patented sept. 30, 1913.

2 SHEETS-SHEET 2.

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rafrnn'r cerros.

CHARLES D. KELLY PATRICK MAI-IONEY, 0F OAKVIEV, PENNSYL'VIMWIA;v

CONCRETE anon.

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Specification of Letters Patent. Application me@ Marchas; i912. serialNo. 887,263.

Patented Sept. 30, 1913.

Be it lrnownthat we, CHARLES KELLY and PATRICK MAHONEY, `citizens of-the United States, residing at Oakview, county of Delaware, and Statevof Pennsylvania, have invented certain new and useful Improvements inConcrete 'Ar-ches, of which the following is aspecification.

Our invention relates'to improvements in concrete arches, the object ofthe invention being to provide an improved concrete arch which may beconstructed without Vbracing i from belo-w, and which is efficientlyreinforced by wires connecting verticall piers.

A further obj ect is to provide animproved construction of the character-described lwhich may be built .out from pier to pier from above,utilizing the reinforcing of the arch as a support-for the boardsconstituting the bottom or arch mold.

With these and other objects in vie-w, the invention consists in certainnovel features of construction and combinations and arrangements ofparts, as will be more fully hereinafter described and pointed out inthe claims.

In the accompanying drawings: Figure 1, is a view in longitudinalsection illustrating the arch showing the arrangement of supportingwires and boards. Fig. 2, is a view in transverse section on Vthe line2-2 of Fig. 1. Fig. 3, is a plan view on a reduced scale, and Fig. 4, isa view in section on the line 1-4 of Fig. 1. Y I

In carrying out our invention, the piers 1,

1, Vare formed and on their upper portions are shaped as shownV at 2. Inother words,

` these piers are provided with shoulders 3 which extend inwardly thedesired distance to receive and support the end of the arch connectingthe piers. As the piers are being built, when they reach a certainheight,

U-shaped wires i are laid in the concrete and are provided on theouterfaces of the `piers Vwith eyes 5.. At af higher elevation, AsimilarU-shaped Vwires 6 are laid in the piers, and they are' provided on`their inner ends with eyes 7. By reason of these U- shaped wires, theycannot pullout of the piers, and form perfect anchors. After the piersare completed, wires 8 are connected at their ends toV the eyes 5, andare drawn taut over the upper ends of the piers. Other `wires 9 areconnectedV at their ends to the eyes 7, and these wires arerelativelyslack. After the wires 8 are secured in place,

` boards or timbers (not shown) may be supported on these wires to alloWworkmen to fmove out `over the same and connect the jwires 8 with .thewires 9 by means of hooks 10. These hooks vary in length, the shortesthook being centrally between the piers, l.and the longest hook adjacentthe piers, so fthat while the upper ends of the hooks are all inalineinent, the lower ends are in the .arc of a circle and support thisposition.

timbers 11 against the sides of the` arch,

while transversely positioned boards 12 are:

supported on the wires 9 between the hooks 10. The timbers 11 and theboards 9 form-a -mold for the arch, but the arch is built out graduallyfrom the piers toward the center. In other words, the concrete is placedfirst adjacent the piers, working, of course, from above. This firstconcrete will restupon the shoulders 3 of the piers, and working fromboth piers toward the center, the concrete gradually reaches the centerof the arch. rIhis concrete is built out in instalments, allowingcertain portions to set before other portions are added. vThen theconcrete reaches the center of the arch, and becomes set, the timbers 11and the parts 12 are removed. Portions of the wires and hooks will, ofcourse, be embedded in the concrete structure, and any projecting endsmay be the wires 9 in' The outer set of hooks 10` serve to holdy cut offand the surface suitably troweled so as to leave it smooth and free fromobstructions. Y

By reason of this method, we are enabled to build the arch from above,without providing any supports underneath the arch which are diiiicultto place in position, difcult to remove, and add greatly to the cost ofbuilding.

Various slight changes might be made in the general form and arrangementof parts described without departing from ourv invention, and hence wedo not limit ourselves to the precisedetails set forth, but'considerourselves at liberty to make such changes and alterations as fairly fallwithin the .spirit and scope of the appended claims.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent is:

1. A reinforced concrete structure of the character described,comprising piers hav- "ing shoulders on their opposed faces at theirupper-ends, wires anchored in the piers and forming eyes at the innerand outer faces of the piers, wires secured to the eyes on the outerfaces' of the piers and extended over the upper ends of the piers, otherwires connecting the eyes at the inner faces of the piers, and longerthan the distance between the piers, and hangers connecting the wiresextended across the top of the piers with the last-mentioned wires, saidhangers of different lengths, whereby the last-mentioned wires arearched, and concrete material extended from shoulder to shoulder of thepiers, substantially as described.

2. A reinforced concrete structure of t-he character described,comprising piers having shoulders on their opposed faces at their upperends, wires anchored in the piers and i' vforming Veyes at the inner andouter faces of the piers, wires secured to the eyes on the outer facesof the piers and extended over the upper ends of the piers, other wiresconnecting the eyes at' the inner faces of the Copies of this patent maybe obtained for five cents each, by` adressin wires are arched, andconcrete material ex-k tended froln shoulder to shoulder` of thepiers,-said concrete extended over the upper ends of the piers embeddingthat portion of the wire on top of t-he piers'and embedding the hangersthroughout the greater portion of their length, substantially asdescribed.

In testimony whereof we have signed our naines to this specication inthe presence of the subscribing witnesses.

CHARLES l). KELLY.

PATRICK xsl MAHONEY.V

' mark l/Vitnesses R. H. KRENKEL, H. STBAUss,

Cialis.k E. P'o'rrs.Y

Washington, D. C.

g the CommissionerV of Patents.

